thanks for the nice article on the 2 bt kick.
the idea of "scissoring" an upbeat of one leg at the same time the other leg scissors past it in a downbeat is something i haven't paid a lot of attention to until i saw the article you posted.
i took a look today at the 2bt kick or laure manaudou, then shinji. it appears to me from the underwater videos that these two swimmers are different in this regard.
laure appears to "scissor", while shinji appears to merely relax the leg which is not downbeating.
i am wondering if others feel my observation is accurate, and would like to know thoughts from others, or experince in this regard. i'm going to experiment with rhythmic "scissoring" at my next swim.